Class Response: Diffusion Lab

The diffusion lab was not a success because the corn starch did not turn dark purple when the iodine was put in the beaker.  Mrs. Rousseau put some more iodine in the beaker and as we waited about fifteen minutes. After fifteen minutes we pulled out the bag and the bottom of it was dark purple. The reason this lab did not work is because the plastic bags were too thick and did not allow in the iodine with the corn starch. I think it would have worked if we poked a small hole in the bag and let some of the corn starch out into the beaker.